Northern Prairie Wildlife Research Center


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Aquatic and Wetland Vascular Plants of the Northern Great Plains

62. Cyperaceae, the Sedge Family

2. Carex L. -- Sedge

51. Carex sychnocephala Carey

Tufted from fibrous roots (often acting as an annual); culms often numerous and crowded, obtusely trigonous, 0.5-6 dm long. Leaves 1.5-4 mm wide; sheaths tight, white-hyaline ventrally. Spikes bisexual, gynaecandrous, densely aggregate in ovoid heads 1.5-3 cm long; bracts leaflike, 2-4 per head, the longest ones many times longer than the heads; pistillate scales hyaline with a green midvein, acuminate or cuspidate, mostly 2/3 as long as the perigynia. Perigynia green to stramineous, flat, scale-like, lanceolate, 5-6.5 mm long, 1/6 as wide, slightly nerved dorsally and ventrally, narrowly wing-margined to the base, spongy below the achene at maturity, tapering or contracted to the slender, serrulate beak which is 3-4.5 mm long, slenderly bidentate; achenes lenticular, 1-1.5 mm long; stigmas 2. Jun--Sep. Wet meadows, shores, mud flats and stream banks; occasional from n and e ND to e SD; (NY and Ont. to Alta., s to WI, IA, SD and MT).


Carex sychnocephala (from Hermann 1970).

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